How to set default values for missing environment variables in maven pom -


is possible have maven provide default values missing environment variables? if so, how?

context:

i have properties files placeholders environment variables, this: my.property=${env:environment_property}

running maven (edit: not mvn ... -denvironment_property=some_value) if environment variable set in os makes resolve property placeholder given value. if environment variable not exist, value blank.

problem:

i environment variables have default value. if environment variable not exist should given default value specified in pom or properties file or whatever.

important:

the property placeholders have point environment variable.

the maven resources plugin friend. should run part of build. not filter resources default. have configure that:

  <resource>      <directory>src/main/resources</directory>      <filtering>true</filtering>   </resource>

then configure filter:

<build>    ...    <filters>       <filter>my-filter-values.properties</filter>    </filters>

put default values want file. given precedence of properties in maven:

(1) command line (2) settings.xml (3) pom.xml (4) filters

the properties in filter file can act want have defaults.

for proper explanation of filters, consult official documentation: filters under maven-resources-plugin ! (it's here)


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